Median of the reduced χ² in every multipole bin ℓ, for all the N_sim simulations of d0 (top, orange), d1T (middle, green) and d1 (bottom, blue), on f_sky = 0.7. The reduced χ² values are reported for the four different fitting schemes: MBB (circles), β-1 (crosses), β-T (diamonds) and β-2 (triangles). The values for the four fitting schemes are shifted from each others by ℓ = 2, in order to distinguish them. The black dashed line represents .